---
title: exponentSymbol
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/numberformatter/exponentsymbol
---

# exponentSymbol

The string used to represent an exponent symbol.

## Declaration

```swift
var exponentSymbol: String! { get set }
```

## Discussion

Discussion By default, this property is set to the latin capital letter e (E). The exponent symbol is the “E” or “e” in the scientific notation of numbers, as in “1.0E+42”.

## See Also

### Related Documentation

- [NumberFormatter.Style.scientific](foundation/numberformatter/style/scientific.md)

### Configuring Numeric Symbols

- [percentSymbol](foundation/numberformatter/percentsymbol.md)
- [perMillSymbol](foundation/numberformatter/permillsymbol.md)
- [minusSign](foundation/numberformatter/minussign.md)
- [plusSign](foundation/numberformatter/plussign.md)
- [zeroSymbol](foundation/numberformatter/zerosymbol.md)
- [nilSymbol](foundation/numberformatter/nilsymbol.md)
- [notANumberSymbol](foundation/numberformatter/notanumbersymbol.md)
- [negativeInfinitySymbol](foundation/numberformatter/negativeinfinitysymbol.md)
- [positiveInfinitySymbol](foundation/numberformatter/positiveinfinitysymbol.md)